/*
 * Copyright 2010 Chad Retz
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.jdocng.parse.qdox.function;

import org.jdocng.parse.qdox.QDoxContext;
import org.jdocng.shared.model.ThrowsTagImpl;

import com.thoughtworks.qdox.model.DocletTag;
import com.thoughtworks.qdox.model.JavaMethod;
import com.thoughtworks.qdox.model.Type;

/**
 * Construct {@link ThrowsTagImpl} from {@link DocletTag}
 *
 * @author Chad Retz
 */
public class ThrowsTagFunction extends TagFunction<ThrowsTagImpl> {

    private static final ThrowsTagFunction instance = new ThrowsTagFunction();
    
    public static ThrowsTagFunction getInstance() {
        return instance;
    }
    
    protected ThrowsTagFunction() {
    }
    
    @Override
    public ThrowsTagImpl apply(QDoxContext context, DocletTag from) {
        ThrowsTagImpl to = new ThrowsTagImpl();
        apply(context, from, to);
        return to;
    }
    
    @Override
    public void apply(QDoxContext context, DocletTag from, ThrowsTagImpl to) {
        super.apply(context, from, to);
        to.setKind("@throws");
        //TODO type
        String firstWord = TagFunction.getFirstWord(from.getValue());
        JavaMethod method = (JavaMethod) from.getContext();
        for (Type type : method.getExceptions()) {
            //TODO handle non-classes
            if (firstWord.equals(type.getValue())) {
                to.setException(firstWord);
                to.setExceptionComment(from.getValue().substring(
                        firstWord.length()).trim());
            }
        }
    }

}
